From mboxrd@z Thu Jan  1 00:00:00 1970
From: Charles Berry <ccberry@ucsd.edu>
Subject: Re: Error: (wrong-type-argument integer-or-marker-p nil)
Date: Fri, 29 Nov 2013 22:21:44 +0000 (UTC)
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Sebastien Vauban <sva-news@...> writes:

> 
> Hello Nicolas,
> 
> Nicolas Goaziou wrote:
> > "Sebastien Vauban" <sva-news@...> writes:
> >
> >> When trying to convert a document which contains R graphics, I get the
error:
> >>
> >> Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p nil)
> >>   goto-char(nil)
> >>   (progn (goto-char link-end) (skip-chars-forward " 	"))
> >>   (setq post-blank (progn (goto-char link-end) (skip-chars-forward " 
")) end (point))
> >
> > Thank you for the report.
> 
> Thank you for your prompt attitude, as always...
> 
> > Could you provide an ECM for it?
> 
> Not easy, no, as it now disappeared after an update to the latest version
> of Org.
> 
[rest deleted]

There was a problem with org-element-cache-* that Nicolas just fixed 
recently that was generating issues that seem to me could be causing
what you reported.

See

http://thread.gmane.org/gmane.emacs.orgmode/79160/focus=79377


If you do pursue this, you might try turning off the caching to see
if the problems you mention goes away. Or just do

  M-: (org-element-cache-reset) RET

before each export.

HTH,

Chuck